Help. My 15 week old silver-laced Wyandotte is plucking her feathers out

Dottie has plucked every feather from her neck to her feet out and I think she ate most of them. This happened in 2 days. The skin on her legs has turned green and she has huge sores on her legs and belly. The flock is a mixed flock and gets dusted regularly none of the others are pulling feathers. I have soaked her in warm water and point ointment on her sores and they are scabbing over. I gave her a big time dusting again. I gave her an antibiotic in her water, and her legs look better, but she looks like she is in pain in her legs. She is separated from the flock and has taken up residence in the garage. She will often pull out a feather and munch it down before I can stop her. She looks awful! Any ideas???? I have looked at her poop and she may have little stringy red things in it, but I am not sure. I have literally picked through her poop looking for worms etc.
Any suggestions are helpful

Green legs and sores all over her? That's a tough one. A picture would be really helpful, but as a new member I don't think you can post pics at this point. Do you have the capability of posting pics? It is fairly easy to run your post numbers up to the pic-posting-level, but there is no point unless you can actually get us a few shots of her. Are you able to get some pics and show us what she has going on? I can't really even start to say what is going on without seeing the bird first.

Blukote doesn't work that well to stop picking. There are better products on the market- Hot Pick/No Pick, pine tar and pinless peepers. I am thinking there is more going on than just the feather picking, though. I think the feather picking may just be another symptom of a larger problem.

Try the peepers for the plucking. Make sure she has enough protein- BOSS and egg are good boosters; you may think about getting some yogurt in her, too, to make sure it's not a deficiency of some kind. Sounds like you are doing what you can with the dusting and ointment/vaseline on the legs in the event it's mites. Definitely keep her separated until she's well.

I have read a number of post across a number of forums about chickens with red strigny stuff in the droppings. People come up with a number of answers but not once have i seen the most likely answer. This is a classic sign of Necrotic Enteritis which is an problem with the small intestine. Personally i would say this may be your problem i would reccomend a treatment with one of the following phenoxymethyl penicillin, amoxycillin, neomycin. I would treat asap for 3-5 days and would be very suprised if you dont see a vast improvement. I hope this helps.